The global market for ultraviolet water treatment systems is expected to grow to around 450 million dollars in 2011, rising to almost 630 million dollars by 2015. Major cities around the world are implementing UV technology – New York is currently installing the world’s largest drinking water system with 56 UV reactors – while UV is increasingly being used in innovative wastewater reuse projects. The competitive marketplace sees several companies vying to differentiate their products on the efficiency of their UV lamps and cost, while aggressive research and development is likely to lead to the introduction of new innovations like UV LEDS (Light Omitting Diodes) by 2013.